Hi Niel, not really as Mick says probarbly colour varients , different rivers different camoflage techniques ?
A lot of my thoughts were based upon Hamiltons original descriptions , he described B.dario and B.geto , but its since widely percieved that the Geto's were juvenile Dario's , it just seemed a bit odd to me because colouration aside Dario's have a pretty unique kind of look , for me the Dario head shape is like no other really , I suppose Striata is similar , but not the same and easy enough to tell apart !
The thing that is always in the back of my mind is that Hamilton described both Puntius Gelius and Puntius Caninus which are believed to both be just P.gelius , thogh to me Gelius and Caninus are distinct from each other ! so on that proviso perhaps there is a Botia Geto hiding out there
